[ElliotEtag]

• Replaces the setup page’s legacy API-key callback and hardcoded models with the published Polli CLI flow, retaining its design and credits.
• Adds a dependency-free static build and the shared Sites workflow; deployment credentials stay separate from build code.
• Preserves 22 app-history commits and the MIT license, redacting historical key-like strings. Keeps legacy installer links forwarding to npm.
• Validated: Node 24 asset test/build, workflow lint, desktop/mobile browser checks, all four Copy buttons, and clearing old credential URLs.

The maintainer approved checking the actual .app deployment after merge and production promotion, before redirecting .ai or merging monorepo cleanup. The current Pages deployment remains available for rollback.